body{
    background: url("../img/1.jpg");

    background-size: cover;
    width: 100%;
    height: 100%;
}

.form{background: rgba(255,255,255,0.25);width:400px;margin:120px auto;}
/*阴影*/
.fa{display: inline-block;top: 27px;left: 6px;position: relative;color: #ccc;}
input[type="text"],input[type="password"]{padding-left:26px;}
.checkbox{padding-left:21px;}
